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11. Installation Instruction
11.1 Pipe Length
Length Calculation
Model
U-4LA1E5, U-5LA1E5, U-6LA1E5
U-4LA1E5-1, U-5LA1E5-1, U-6LA1E5-1
Length Piping connection example
Indoor / outdoor unit height difference 30m or less
Allowable
height
different
Indoor / Indoor unit height difference 15m or less
Total piping length 20m ~ 90m Main1+Main2+Main3+Main4+Sub1+Sub2+Sub3+Sub4+Sub5
Total Main piping length 40m or less Main1+Main2+Main3+Main4
Total Sub piping length 50m or less Sub1+Sub2+Sub3+Sub4+Sub5
Sub piping length 15m or less
From outdoor unit to innermost indoor unit
difference
55m or less
Allowable
piping length
From 1
st
branch to innermost indoor unit
difference
30m or less
Example of piping connection
Indoor & outdoor
height difference
Max 30m
Indoor & outdoor
height difference
Max 15m
Main1
Main2
Main3
Main4
Sub1
Sub3
Sub5
Sub4
1
st
branch
Outdoor unit
From “1
st branch” to farthest indoor unit” difference Max 30m
“Outdoor unit” to “farthest indoor unit” difference Max 55m
Sub2
Indoor unit
Main1+2+3+4=Max40m
Sub1+2+3+4+5=Max50m
Each Sub (1/2/3/4/5) = Max 15m
Indoor unit Indoor unit
Farthest
Indoor unit
Indoor unit
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